Here I have updated the outgoing SMTP server hostname and the username.
I have also updated the outgoing SSL and authentication, but that isn’t critical.

Click Done.

You may get a ‘Confirm Security Exception’ warning message.
This is because the email account is on a shared server and the server’s certificate doesn’t match the account you’ve just set up. Nothing to worry about. Choose to permanently ignore this.
You will get this message twice, this is once for the incoming account and once for the outgoing account.